Enamel insulation stripping tool



y 1950 G. M. JENKINS 2,507,017

ENAMEL INSULATION STRIPPING TOOL Filed Sept. 16, 1949 IIIIIIIIIIIIII-III'IIll! INVENTOR OT/1'52 M JEN/(M49,

ATTORNEYJQ Patented May 9, 1950 UNITED STAT ES PAT ENT OFFICE ENAMEL INSULATIQN STRIPPING TOOL Gothern M. Jenkins, Doniphan, Mo.

Application September 16, 1949, Serial No. 116,142

Claims. 1

This application is a continuation-impart of my abandoned application Serial No. 29,163, filed May 25, 1948, and has to do with an invention relating to a stripping tool.

An object of the invention is to provide a tool which is especially suitable for the stripping of enamel insulation from wire.

Another object of. the invention is to provide a stripping tool which is simple in structure, easy tov manipulate, and which. can be produced at a low cost.

A further object of the invention is to provide a stripping tool which is of a structure such that it may be manipulated in a restricted confined space, and which is eifective for the removal of enamel insulation from fine wire, as for example, wire employed in connection with radio, television, electronics, motors, refrigeration and telephones.

Other objects and advantages will become apparent from the following description.

An embodiment of the invention is illustrated by way of example in the accompanying drawing, wherein:

Figure 1 is a side elevational view of the tool according to the present invention;

Figure 2 is a plan View of the tool shown in Figure 1;

Figure 3 is a fragmentary sectional view taken along the line 33 of Figure 2;

Figure 4 is av perspective view of the tool of the present invention in use; and

Figure 5 is a perspective view of an abrasive strip employed as a part of the tool of the invention.

Referring tothe drawing, the. numeral l designates the toolof the. invention, said tool comprising a pair of arms arranged in face-to-face spaced relationship and connected at one end for movement toward and away from eachother. Specifically, the arms are formed from a band 2 fabricated of resilient metal and bent in the form of a U. The under face of each of the arms or legs 3 of the U-shaped band 2 is provided with a thickened portion 4. The thickened portion 4 of each leg 3 of the band 2 is tapered, the taper extending from the free end of each leg 3 toward the bight of the band 2 and terminating at a point substantially midway of each leg, as clearly shown in Figures 1 and 3. Encircling the thickened portion 4 of each leg 3 of the band 2 and mounted for slidable movement on said portion 4 is a clamping sleeve 5. Each sleeve 5 is fabricated of metal and is constructed to conform to the shape of the part of each leg 3 having the thickened portion 4 thereon.

Positioned on the confronting faces of the arms or legs 3 and extending inwardly from the edge of the end of the arms or legs 3 opposite the bight of the band 2, is a strip of abrasive material 6.

As shown in Figure 5, the strip of material 6 has an abrasive on one face thereof, and is folded on itself so that the abrasive is on the outer surfaces of the legs 1. Each strip of material 6 has its legs 1 arranged on the free end of each arm or leg 3, so that the under surfaces thereof are in facing relationship with the adjacent faces of the part of the leg or arm 3 of the band 2 containing the thickened portion 4, with the folded or connecting part 8 surrounding the tip of the free end of the arm or leg 3, and the upper surfaces of the legs I of the strips 6 being enveloped by the sleeves 5. The portion 4 on each of the arms or legs 3 constitutes a, means engageable with the sleeves 5 adjacent thereto for clamping the inwardly-extending portion of the strip 6 to the adjacent arm or leg 3.

Each leg 3 of the band 2 is provided with a protuberance 9 projecting laterally from each side edge adjacent to the tip of the free end thereof, the lateral protuberances being arranged in opposed aligned relation and forming a stop for limiting the movement of the adjacent clamping sleeve 5 toward the other arm end.

When the sleeves 5 are shifted to the position such that the ends engage the adjacent opposed protuberances 9, the inner walls of the respective sleeves are out of frictional engagement with the enveloped part containing the thickened portion of the arms or legs 3. With the sleeves in this position, the legs. of the folded abrasive strips 6 may be positioned so that the under surfaces of such legs are in facing relationship with the adjacent faces of the respective parts of the legs or arms 3 of the band 2 containing the thickened portion 4, with the folded or connecting part 8 surrounding the tips of the free ends of the legs 3. The legs of the abrasive strips 6 may then be pushed inwardly so that they are loosely enveloped by the sleeves 5, whereupon. the sleeves are moved away from the adjacent opposed protuberances. 5 and toward the bight of the band 2, this latter movement resulting in. the. frictional engagement of the sleeves 5 with the enveloped ends of the strips 6 and complemental faces of the thickened parts 4 and side edges of the arms 3 to thereby clamp the strips 6 onto the arms. Movement of the sleeves 5 toward the adjacent opposed protuberances 9 releases the sleeves 5 from frictional engagement with the enveloped ends of the strips 6 and the complemental faces of the thickened parts 4 and side edges of the arms.

The abrasive strip 6 may be formed of cloth, paper, steel or other flexible material and is preferably provided on one of its faces with a suitable abrasive, such as sand, emery, carborundum, ground glass or the like. Also, the strip 6 has a slightly narrower width than the supporting other end of the arm or leg 3 and conforming to the width of the arm or leg 3 and the adjacent sleeve 5.

In operation of the tool of the invention, the wire In, Figure 4, is placed between the facing abrasive surfaces of the tool, and the wire either pulled through the facing surfaces or the tool pulled along the wire, while manually compressing the arms or legs 3 toward each other.

What is claimed is:

1. In an enamel insulation stripping tool, comprising a pair of arms arranged in face-to-face relationship and connected at one end for movement toward and away from each other, a sleeve positioned on each arm and mounted for slidable movement toward and away from the other end of the latter, and a strip of abrasive material disposed on each of the confronting faces of said arms and extending inwardly from the edge of the other end of said arms, the inwardly-extending portion of each of said strips being embraced by the sleeve adjacent thereto, a face of each of said arms adjacent the other end of the latter being provided with a wedging portion engageable with the sleeve adjacent thereto for clamping the inwardly-extending portion of said strip to the adjacent arm.

2. In an enamel insulation stripping tool, comprising a pair of arms arranged in face-to-face relationship and connected at one end for movement toward and away from each other, a sleeve positioned on each arm and mounted for slidable movement toward and away from the other end of the latter, a strip of abrasive material disposed on each of the confronting faces of said arms and extending inwardly from the edge of the other end of said arms, the inwardly-extending portion of each of said strips being embraced by the sleeve adjacent thereto, a face of each of said drums adjacent the other end of the latter being provided with a wedging portion engageable with the sleeve adjacent thereto for clamping the inwardly-extending portion of said strip to the adjacent arm, and stop means in the form of a widened portion adjacent the other end of each of said arms and engageable with the end of the adjacent sleeve for limiting the movement of the latter toward the other arm end.

3. In an enamel insulation stripping tool, comprising apair of arms arranged in face-to-face relationship and connected at one end for movement toward and away from each other, a sleeve positioned on each arm and mounted for slidable movement toward and away from the other end of the latter, a strip of abrasive material disposed on each of the confronting faces of said arms and extending inwardly from the edge of the other end of said arms, the inwardly-extending portion of each of said strips being embraced by the sleeve adjacent thereto, a face of each of said arms adjacent the other end of the latter being provided with a wedging portion engageable with the sleeve adjacent thereto for clamping the inwardlyextending portion of said strip to the adjacent arm, and stop means in the form of a protuberance adjacent the other end of each of said arms and engageable with the end of the adjacent sleeve for limiting the movement of the latter toward the other arm end.

4. In an enamel insulation stripping tool, comprising a pair of arms arranged in face-to-face relationship and connected at one end for movement toward and away from each other, a sleeve positioned on each arm and mounted for slidable movement toward and away from the other end of the latter, a strip of abrasive material disposed on each of the confronting faces of said arms and extending inwardly from the edge of the other end of said arms, the inwardly-extending portion of each of said strips being embraced by the sleeve adjacent thereto, a face of each of said arms adjacent the other end of the latter being provided with a wedging portion engageable with the sleeve adjacent thereto for clamping the inwardly-extending portion of said strip to the adjacent arm, said wedging portion embodying a thickened tapered portion, the taper extending inwardly from the other end of each arm and terminating at a point spaced from the connected ends of said arms.

5. In an enamel insulation stripping tool, comprising a pair of arms arranged in face-to-face relationship and connected at one end for movement toward and away from each other, a sleeve positioned on each arm and mounted for slidable movement toward and away from the other end of the latter, a strip of abrasive material disposed on each of the confronting faces of said arms and extending inwardly from the edge of the other end of said arms, the inwardly-extending portion of each of said strips being embraced by the sleeve adjacent thereto, a face of each of said arms adjacent the other end of the latter being provided with a wedging portion engageable with the sleeve adjacent thereto for clamping the inwardly-extending portion of said strip to the adjacent arm, said wedging portion embodying a thickened tapered portion, the taper extending inwardly from the other end of each arm and terminating at a point spaced from the connected ends of said arms, and stop means in the form of a protuberance adjacent the other end of each of said arms and engageable with the end of the adjacent sleeve for limiting the movement of the latter toward the other arm end.

GOTHERN M. JENIQNS.

N 0 references cited. 

